[o] (2) * Fix the sample script for making the hypothetical tree when

   creating an outline
 * Removed notes saying <video> and <audio> were being kept simple for
   now
 * Changed to a new set of states for networking et al
 * Mention that the mapping from time to frames is codec-specific
 * Remove togglePause() completely
 * Add UI toggle (controls="")
 * Introduce error codes for media elements
 * Removed seek(), instead made position mutable
 * Added seekable attribute
 * Added event summary
 * Fixed IDL of <source>
 * Fix some step numbers in the content sniffing algorithm
 * Fail to define "fire a progress event"
 * Minor editorial work


git-svn-id: http://svn.whatwg.org/webapps@707 340c8d12-0b0e-0410-8428-c7bf67bfef74